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package ihl.enviroment;
import java.util.BitSet;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import ihl.ClientProxy;
import ihl.IHLMod;
import ihl.utils.IHLMathUtils;
import net.minecraft.world.World;
@SideOnly(value = Side.CLIENT)
public class LightSource {
private final int centerX;
private final int centerY;
private final int centerZ;
public int fromX;
public int fromY;
public int fromZ;
public int toX;
public int toY;
public int toZ;
private final int red;
private final int green;
private final int blue;
private final int power;
public final BitSet illuminatedBlocks = new BitSet();
public LightSource(int centerX1, int centerY1, int centerZ1, int red1, int green1, int blue1, int power1) {
centerX = centerX1;
centerY = centerY1;
centerZ = centerZ1;
red = red1;
green = green1;
blue = blue1;
power = power1;
}
public void setBorders(int fromX1, int fromY1, int fromZ1, int toX1, int toY1, int toZ1) {
fromX = fromX1;
fromY = fromY1;
fromZ = fromZ1;
toX = toX1;
toY = toY1;
toZ = toZ1;
}
public boolean isBlockIlluminated(int x, int y, int z) {
if (x < fromX || x > toX || y < fromY || y > toY || z < fromZ || z > toZ) {
return false;
} else {
int rx = x - centerX;
int ry = y - centerY;
int rz = z - centerZ;
int l = ((ClientProxy) IHLMod.proxy).getLightHandler().encodeXYZ(rx, ry, rz);
return illuminatedBlocks.get(l);
}
}
public int[] getLightValue(int x, int y, int z, int[] normal) {
int dx = centerX - x;
int dy = centerY - y;
int dz = centerZ - z;
int d = dx * dx + dy * dy + dz * dz;
if (d == 0) {
return new int[] { 0xf0, this.red, this.blue, this.green };
}
if (normal[0] + normal[1] + normal[2] == 0) {
dx = dx < 0 ? -dx : dx;
dy = dy < 0 ? -dy : dy;
dz = dz < 0 ? -dz : dz;
} else {
dx = normal[0] * dx;
dy = normal[1] * dy;
dz = normal[2] * dz;
dx = dx > 0 ? dx : 0;
dy = dy > 0 ? dy : 0;
dz = dz > 0 ? dz : 0;
}
int r = power * (dx + dy + dz) / d;
r = r<0?0:r;
int brightness = r > 15 ? 15 : r;
return new int[] { brightness << 4, this.red*r, this.green*r, this.blue*r};
}
@Override
public boolean equals(Object o) {
if (o instanceof LightSource) {
LightSource otherLS = (LightSource) o;
return this.centerX == otherLS.centerX && this.centerY == otherLS.centerY && this.centerZ == otherLS.centerZ
&& this.fromX == otherLS.fromX && this.fromY == otherLS.fromY && this.fromZ == otherLS.fromZ
&& this.toX == otherLS.toX && this.toY == otherLS.toY && this.toZ == otherLS.toZ;
}
return false;
}
public void provideLight(World world, int x, int y, int z) {
int dx = x-centerX;//100 10 20
int dy = y-centerY;
int dz = z-centerZ;
int sqd = dx*dx+dy*dy+dz*dz;
float d = IHLMathUtils.sqrt(sqd);
float dx1 = dx/d;
float dy1 = dy/d;
float dz1 = dz/d;
float x1 = x+0.5f;
float y1 = y+0.5f;
float z1 = z+0.5f;
for(int i=0;i<64;i++){
x1+=dx1;
y1+=dy1;
z1+=dz1;
int absX = (int)x1;
int absY = (int)y1;
int absZ = (int)z1;
int ddx = absX-centerX;
int ddy = absY-centerY;
int ddz = absZ-centerZ;
this.illuminatedBlocks.set(((ClientProxy) IHLMod.proxy).getLightHandler().encodeXYZ(ddx, ddy, ddz));
if (absX < fromX) {
fromX = absX;
} else if (absY < fromY) {
fromY = absY;
} else if (absZ < fromZ) {
fromZ = absZ;
} else if (absX > toX) {
toX = absX;
} else if (absY > toY) {
toY = absY;
} else if (absZ > toZ) {
toZ = absZ;
}
if(world.getBlockLightOpacity(absX, absY, absZ)>192) {
break;
}
}
}
public void castShadow(World world, int x, int y, int z) {
int dx = x-centerX;
int dy = y-centerY;
int dz = z-centerZ;
int sqd = dx*dx+dy*dy+dz*dz;
float d = IHLMathUtils.sqrt(sqd);
float dx1 = dx/d;
float dy1 = dy/d;
float dz1 = dz/d;
float x1 = x+0.5f;
float y1 = y+0.5f;
float z1 = z+0.5f;
x1+=dx1;
y1+=dy1;
z1+=dz1;
for(int i=0;i<64;i++){
x1+=dx1;
y1+=dy1;
z1+=dz1;
int absX = (int)x1;
int absY = (int)y1;
int absZ = (int)z1;
int ddx = absX-centerX;
int ddy = absY-centerY;
int ddz = absZ-centerZ;
this.illuminatedBlocks.clear(((ClientProxy) IHLMod.proxy).getLightHandler().encodeXYZ(ddx, ddy, ddz));
if (absX < fromX) {
fromX = absX;
} else if (absY < fromY) {
fromY = absY;
} else if (absZ < fromZ) {
fromZ = absZ;
} else if (absX > toX) {
toX = absX;
} else if (absY > toY) {
toY = absY;
} else if (absZ > toZ) {
toZ = absZ;
}
if(world.getBlockLightOpacity(absX, absY, absZ)>192) {
break;
}
}
}
}
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